
Elia RamírezNational Autonomous University of Mexico | UNAM · Department of Paleontology
Elia Ramírez
Doctor of Philosophy
Palynology researcher
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60
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Introduction
Skills and Expertise
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June 1992 - present
Publications
Publications (60)
Seventeen propolis samples from Melipona beecheii, Nannotrigona perilampoides, Plebeia frontalis, Scaptotrigona mexicana, and S. pectoralis in tropical regions of Veracruz and Yucatan, Mexico were analyzed for pollen. All samples were individually placed in a glass jar with EtOH and they were daily shaken for a week. Then they were filtered and ace...
Beneficial molecules for bee colony nutrition and health are also nutritional and medicinal for humans consuming bee products. Stingless bee species are a source of entomological variability in the honey and pollen they produce, besides the plants they forage and the microbial associations receiving particular attention in classic microbiology, foo...
The application of propolis ethanolic extract in pasture silage was evaluated in weaned lamb growth. Propolis produced by the Mexican stingless bee, Scaptotrigona mexicana, was extracted in ethanol and applied to pasture silage of Panicum maximum. Treatments were conducted in vitro to determine the degree of inhibition of pathogenic microbe growth...
Background:
Although the loss of Melipona beecheii colonies in meliponaries suggests insufficient availability of melliferous blooming plants, there is limited knowledge about the diversity and conditions of the surrounding vegetation.
Question:
What is the diversity, structure, and composition of the melliferous and non-melliferous vegetation sur...
The Mayan bee Melipona beecheii is one of the most important and widely cultivated stingless bees in Mexico. In order to document pollen and nectar resources for M. beecheii during the dry season, 25 pot-pollen and 25 pot-honey samples were collected from February to May 2021 at eight villages in Yucatan, Mexico. All samples were acetolysed, and 50...
An analysis of the floristic composition, structure and diversity of the tree and shrub strata was carried out at the tropical deciduous forest of El Picante hill, located in San José Tilapa, Puebla. Five transects (T1-T5) were located along the elevation range of 1,055 to 1,095 m asl and the “point-centred quarter” sampling method was used. A tota...
Terrestrial and marine palynomorph assemblages from a total of 42 productive samples from San Gregorio Formation core LB1 were analysed. Marine palynomorphs, such as dinocysts, acritarchs, copepod eggs, among others, dominated the associations. With regard to terrestrial palynomorphs, dicotyledonae (e.g. Anacardiaceae type, Chenopodipollis spp., Br...
Seventeen morphologically related genera have been considered as the Rondeletia complex, traditionally in Rondeletieae. Molecular studies agree that this is a polyphyletic group and some genera have been transferred to Guettardeae. Nevertheless, no solid morphological characters support this hypothesis. Our aim is to explore pollen morphology to se...
Seventeen morphologically related genera have been considered as the Rondeletia complex, traditionally in Rondeletieae.
Molecular studies agree that this is a polyphyletic group and some genera have been transferred to Guettardeae.
Nevertheless, no solid morphological characters support this hypothesis. Our aim is to explore pollen morphology to se...
Borehole (B187) near San Juan de la Costa, Baja California Sur, was collected. The strata of this borehole consists of the El Cien Formation. Dating by U-Pb method in Zircons indicated that the sediments were deposited 27.5 million years ago (upper Oligocene). The B187 paleopalynological research shows that in these strata, palynomorphs of both con...
In this study, we analized for the first time the tropical deciduous forest pollen rain at San José Tilapa, Puebla, located within the biodiverse Tehuacán-Cuicatlán Valley. In 3 transects, 100 m each, bromeliads were collected every 10 m, for a total of 32 samples, from which palynomorphs were recovered and processed by mean of the acetolysis techn...
La miel es un producto alimenticio con alto valor nutricional y potencial farmacológico. La mayoría de los estudios de este producto se han centrado en las propiedades de la miel producida por Apis mellifera, que se ha utilizado en medicina alternativa, destacando por sus actividades antioxidantes, antimicrobianas y antiinflamatorias, entre otras....
La miel es un producto alimenticio con alto valor nutricional y potencial farmacológico. La mayoría de los estudios de este producto se han centrado en las propiedades de la miel producida por Apis mellifera, que se ha utilizado en medicina alternativa, destacando por sus actividades antioxidantes, antimicrobianas y antiinflamatorias, entre otras....
This is the first study of exine ultrastructure to be performed in five endemic Mexican Mimosa taxa (M. pringlei var. pringlei, M. calcicola, M. spirocarpa, M. caerulea and M. sousae), one occurring in Mexico and Central America (M. occidentalis), one widely distributed throughout the neotropics (M. setosa var. paludosa), and two in South America (...
This work aims to provide melittopalynological
knowledge of Melipona beecheii, Plebeia sp.
and Scaptotrigona mexicana pot-pollen samples
in the states of Campeche and Veracruz located
along the Gulf of Mexico and also to contribute
to angiosperm data sets regarding the pot-pollen
provisions of Mexican Meliponini. We also suggest
sustainable activit...
Using standard methods, the Pliocene-Pleistocene paleopalynological assemblages recovered from both the Villa Alegría lacustrine sediments in northern Tehuacán-Cuicatlán Valley (TCV) and the Cerro Prietotravertine in the southern portion of the TCV exhibited high taxa diversity. Clear groupings of floristic elements were observed in cluster and mul...
New Eocene Mequitongo Formation (MF) pollen-spore data suggest evolution of flora as a response to climatic and geological changes. During the early Eocene, conditions were more humid than those that exist today in the botanically diverse Tehuacán-Cuicatlán Valley (TCV), in south-central Mexico. The most representative floristic elements in the pal...
Using standard methods, the Pliocene-Pleistocene paleopalynological assemblages recovered from both the Villa Alegría lacustrine sediments in northern Tehuacán-Cuicatlán Valley (TCV) and the Cerro Prieto travertine in the southern portion of the TCV exhibited high taxa diversity. Clear groupings of floristic elements were observed in cluster and mu...
In La Purísima region, Comondú, Baja California Sur, the borehole B4 was extracted from the San Gregorio formation (upper Oligocene-lower Miocene). It contains continental and marine palynomorphs. The aim of this study was to examine the borehole palinomorphs and analyze their richness and a diversity. We propose the vegetation types in which these...
Desmodium diversity has been mainly classified over emphasising its fruit characters, and due to its variability in these and other traits, its taxonomy has been sometimes difficult and hard to follow. As part of this variation, groups of species have been proposed, and thus, there is a need for clarification and taxonomic reassessments. This is th...
El presente trabajo es una contribución al conocimiento del contenido polínico de seis muestras de miel y seis muestras de cargas de polen de Apis mellifera para conocer el origen botánico y geográfico, procedentes de las regiones Centro y Norte de Guerrero; ambas zonas de interés apícola, durante los meses de noviembre-diciembre del 2005 y marzo d...
Pollen is an important cause of allergic respiratory ailments in the Mexico City Metropolitan Area (MCMA). However, very little is known if ambient air temperature correlates with the early blooming of plants observed in other urban areas around the world. A research study was conducted during the dry season of 2012-2013 at three representative sit...
From the San Gregorio Formation (Upper Oligocene-Lower Miocene), Baja California Sur, Mexico, 105.4 meter-deep borehole “B4” was analyzed. Among the continental palynomorphs, four Tubulifloridites taxa, whose botanic affinity is Asteraceae family (Astereae, Eupatorieae and Heliantheae tribes), were recovered and described. The four Tubulifloridites...
Systematic descriptions and illustrations of the best preserved angiosperm pollen grains (Monocotyledonae or Liliopsida: n= 7 and Dicotyledonae or Magnoliopsida: n= 41) recovered from Cuayuca Formation (late Eocene-early Oligocene), Puebla State, Mexico are provided, some of them of chronostratigraphic importance (Aglaoreidia pristina, Armeria, Bom...
The San Gregorio Formation (Late Oligocene-Early Miocene) is part of the Paleogene and Neogene stratigraphic sequence in La Purísima region, Baja California Sur, Mexico. A borehole from this formation was analyzed with the aim of contributing continental and marine palynomorphs. This paper presents the results concerning to the continental palynomo...
Advances in molecular biology, remote sensing, systems biology, bioinformatics, non-linear science, the physics of complex systems and other fields have rendered a great amount of data that remain to be integrated into models and theories that are capable of accounting for the complexity of ecological systems and the evolutionary dynamics of life....
Palynological assemblages from the Tehuacán Formation (TF), geochronologically dated as Middle Miocene (15.6 ± 0.4 Ma), provide evidence of a highly diverse flora that, at the generic level, is similar to the extant flora in the Tehuacán Valley. We propose that, during Miocene times, plant communities may have been formed of similar botanical eleme...
In the present work, pollen morphology of five triporate Momipites species recovered from the Pie de Vaca Formation (Upper Eocene - Lower Oligocene), the Cuayuca Formation (Upper Eocene - Lower Oligocene), and the Tehuacan Formation (Middle Miocene) from Puebla State, as well as the San Gregorio Formation (Upper Oligocene - Lower Miocene) from Baja...
Paleopalynological studies give information about the evolution of different plant group. Onagraceae is monophyletic and cosmopolitan. Nevertheless, most species are distributed in the American continent. Onagraceae pollen grains are very distinctive, and they could be easily recognized in fossil assemblages from Mexican Cenozoic basins. This is th...
During an aeropalynological study carried out in Merced, Mexico City from October to April (dry season), pollen index of 62,097 grains was obtained using a volumetric sampler (Burkard). A total of 24 taxa were recorded, including 14 arboreal pollen types and 10 herbaceous taxa. Nonetheless, only five of the most abundant and allergenic pollen types...
A total of 12 honey samples were collected for botanical characterisation during the 2006-2007 harvest cycle from the municipalities of Huimanguillo, Cárdenas, Paraíso (Chontalpa region), Centla (Wetlands region) and Tacotalpa (Sierra region) in the state of Tabasco. Melisopalynological (pollen analysis) and physicochemical (pH, ash and electrical...
We studied 40 honey samples from Tabasco State, Mexico with melissopalynology methods. Pollen grains of 29 taxa were important (>10%): Avicennia germinans (Acanthaceae); Borreria verticillata (Rubiaceae); Bursera simaruba (Burseraceae); Cecropia obtusifolia (Moraceae); Coccoloba aff. diversifolia (Polygonaceae), Conocarpus sp. (Combretaceae), Rumex...
We studied 40 honey samples from Tabasco State, Mexico with melissopalynology methods. Pollen grains of 29 taxa were important (>10%): Avicennia germinans (Acanthaceae); Borreria verticillata (Rubiaceae); Bursera simaruba (Burseraceae); Cecropia obtusifolia (Moraceae); Coccoloba aff. diversifolia (Polygonaceae), Conocarpus sp. (Combretaceae), Rumex...
Melissopalynological analysis of 39 honey samples from Oaxaca, Mexico, enabled us to establish the important plant sources exploited by bees during the principal harvest in four districts of the State of Oaxaca, Mexico. A total of 64 taxa belonging to 29 families were recorded. These subtropical honeys were characterised by their botanical origin a...
The Cretaceous Zimapan basin was affected by compressive Laramide deformation, which gave place to tectonic uplift in the area. After regional uplift of the rocks, erosion began to fll several continental intermontane basins with an orientation parallel to the alignment of the major folded structures. The "El Morro Formation" represents the alluvia...
The Cretaceous Zimapan basin was affected by compressive Laramide deformation, which gave place to tectonic uplift in the area. After regional uplift of the rocks, erosion began to fll several continental intermontane basins with an orientation parallel to the alignment of the major folded structures. The "El Morro Formation" represents the alluvia...
Muestras de miel pertenecientes a Scaptotrigona mexicana Guérin y Apis mellifera L. de 10 localidades del norte del estado de Puebla fueron evaluadas por medio de análisis melitopalinológico. Polen de nueve taxa de plantas tuvieron valores de importancia (≥10%): Ageratum houstonianum Mill. (Compositae), Bursera spp. (Burseraceae), Coffea arabica L....
Based on the lithology of the Izucar de Matamoros (IzM) sections, and the occurrence of index taxa such as Armeria, Cicatricosisporites dorogensis, Corsinipollenites, Eucommia, Momipites coryloides, Momipites tenuipolus, Mutisiapollis, and Ranuculacidites operculatus, a correlation between the IzM sections and the Cuayuca Formation stratotypes is p...
Based on the lithology of the Izucar de Matamoros (IzM) sections, and the occurrence of index taxa such as Armería, Cicatricosisporites dorogensis, Corsinipollenites, Eucommia, Momipites coryloides, Momipites tenuipolus, Mutisiapollis, and Ranuculacidites operculatus, a correlation between the IzM sections and the Cuayuca Formation stratotypes is p...
The study of continental rocks in the Metztitlán area allows to define a new lithostratigraphic unit. The Metztitlán Formation is formed by conglomeratic rocks which in the base have elastics of igneous extrusive rocks (basalt) and toward the top of the conglomeratic column change to elastics of carbonate rocks derived from cretaceous sedimentary r...
The study of continental rocks in the Metztitlán area allows to define a new lithostratigraphic unit. The Metztitlán Formation is formed by conglomeratic rocks which in the base have classics of igneous extrusive rocks (basalt) and toward the top of the conglomeratic column change to classics of carbonate rocks derived from cretaceous sedimentary r...
The Oaxaca fault is a Cenozoic structure located in southern Mexico. The extensional deformation related to the northern sector of this fault system formed a half-graben and a topographic depression known as the Tehuacán valley. The Cenozoic strata deposited in the valley recorded a progressive deformation phase with four pulses: pl, p2, p3, and p4...
The Oaxaca fault is a Cenozoic structure located in southern Mexico. The extensional deformation related to the northern sector of this fault system formed a half-graben and a topographic depression known as the Tehuacán valley. The Cenozoic strata deposited in the valley recorded a progressive deformation phase with four pulses: p1, p2, p3, and p4...
Palynological markers such as Aglaoreidia pristina, Armeria, Bombacacidites, Corsinipollenites, Ephedripites claricristatus, Eucommia, Favitricolporites, Intratriporopollenites, Lymingtonia, Magnaperiporites, Malvacipollis spinulosa, Margocolporites vanwijhei, Momipites tenuipolus, Polyadopollenites aff. pflugii, and Thomsonipollis sabinetownensis...
The present work includes a palynofloristic synthesis of Tertiary research carried out at marine and continental basins with particular emphasis on stratigraphy of the Balsas Group sensu Fries (1960). Also it includes palynostratigraphic information related with San Gregorio Formation (Baja California Sur State) and Cuayuca Formation (Puebla State)...
This publication presents the systematics of monolete and trilete spores, and polyplicate, inaperturate and bisaccate pollen grains recovered from outcrops of the Cuayuca Formation, State of Puebla, southern Mexico. Species belonging to the following genera are described and illustrated: Cicatricosisporites, Deltoidospora, Foveotriletes, Leptolepid...
Bronchial asthma is the most common chronic disease in children, producing the highest absenteeism among children and adults.
To determine the relation between respiratory function in asthmatic children and contaminant and climatic environmental factors.
It was performed a study with 26 asthmatic patients, from the Immuno-Allergies Department of th...
The undifferentiated Cenozoic beds in this region have yielded valuable palynological assemblages, ranging in age from Paleocene to Oligocene, although initially the Tertiary sequence was considered as Pliocene-Pleistocene, based on the mammal tracks at the Pie de Vaca locality. This confusion increased due to the presence of Quaternary sediments w...
Weekly larval feeding samples belonging to 51 nests of Euglossa atroveneta were analyzed palynologically at Union Juárez, Chiapas, Mexico. It was determined that E. atroveneta foraged 74 plant species throughout 1 year, from 31 May 1990 to 29 May 1991. The most important resources of larval feeding were classified as: a) polliniferous: Antirhea sp....
The historical phytogeography is closely related to climatic changes and with the modifications of Ecosystems through time caused by th e p la te tecto nics. This pa lin ostratig rap hic review is the result of the surveys carried out in several sedimentary basin from Baja California to Chiapas, Mexico. The paleochorology of angiosperms in Mexican...
Sixty nests of Euglossa atroveneta were studied for one year (May 1990 to May 1991). Euglossa atroveneta females build solitary nests or parasocial nests shared by two, or up to 10 female bees (founder + daughters, or only daughters). The solitary nests were constructed throughout the year but parasocial nests occurred only during the rainy season....
The sources consumed by Nannotrigona testaceicornis (Na), Trigona (Tetragonisca) angustula (Te), Scaptotrigona mexicana (Sc) and Plebeia sp. (Pl) were studied at two localities in southeast Mexico: Unión Juàrez (U.J.) and Santa Teresita (S. T.), by means of melissopalynological analyse of pollen, honey and larval food. A total of 246 samples were c...